Which of the following is one of OSHA's hazard categories?

• A. Ergonomic
• B. Acoustic
• C. Radiological
• D. Thermal

Answer: (A)

Ergonomic hazards arise from how work is done—repetitive motions, awkward postures, heavy lifting, and other body stresses that can lead to musculoskeletal injuries. OSHA recognizes these as a distinct hazard category because addressing the way tasks are performed reduces long‑term injury risk, not just immediate incidents. In backstage work, this shows up when moving heavy gear, looping cables, or standing in fixed positions for long periods; applying ergonomic controls like lifting aids, proper team lifts, adjustable workstations, and regular micro-breaks helps prevent strains.

While acoustic (noise), radiological (radiation), and thermal (extreme heat or cold) hazards are real and important to manage, they’re typically addressed under different safety areas or broader physical/environmental hazard considerations rather than singled out as an ergonomic hazard category.